public class Student {
    public String name;
    public String sex;
    public short age;
    public double score;

    public void DoClass(){
        System.out.println("上课......");
    }
    public void DoHomeWork(){
        System.out.println("做作业......");
    }
    public void Exam(){
        System.out.println("考试......");
    }
}


//由类来创建对象的过程，我们称之为类的实例化
